底板巷道工程的采动响应分析及其围岩控制  

Analysis of Mining-induced Response for Floor Roadway Engineering and Surrounding Rock Control

作　　者：袁越[1,2] 李树清[1,2] 赵延林[1,2] 刘圣[3] 吴海[1,2] Yuan Yue;Li Shuqing;Zhao Yanlin;Liu Sheng;Wu Hai(SAWS Key Laboratory for Control and Prevention of Roof Caving, Coal and Gas Outburst in China Southern Coal Mines,Xiangtan, Hunan 411201, China;Hunan Key Laboratory of Safe Mining Techniques of Coal Mines, Xiangtan, Hunan 411201, China;School of Resources, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan,Hunan 411201, China)

机构地区：[1]南方煤矿顶板及煤与瓦斯突出灾害预防控制安全生产国家安全监管总局重点实验室,湖南湘潭411201 [2]煤矿安全开采技术湖南省重点实验室,湖南湘潭411201 [3]湖南科技大学资源环境与安全工程学院,湖南湘潭411201

出　　处：《工程研究（跨学科视野中的工程）》2017年第2期190-198,共9页JOURNAL OF ENGINEERING STUDIES

基　　金：国家自然科学基金青年项目(51504091);湖南省教育厅一般科研项目(15C0551)

摘　　要：针对采动影响下底板巷道的变形失稳及其围岩控制问题,综合采用现场调研、理论分析、数值计算及现场实测等方法,建立了底板巷道围岩应力的简化计算模型,深入分析了底板巷道围岩应力的采动响应规律及其变形机制。结果表明,在采动邻域内,底板巷道的围岩应力响应十分敏感,大主应力动压系数呈持续增大的趋势,是围岩产生变形的主要阶段;底板巷道水平应力的采动响应值远高于垂直应力,因而容易造成围岩两帮高偏应力部位严重变形,致使顶板载荷支撑结构的破坏,进而引起顶板的垮冒灾害及巷道的整体失稳。现场支护工程实践表明,提出的锚网注+卸压锚索+底板锚索复合控制技术对于底板巷道围岩的稳定性控制切实有效。For problem of surrounding rock control and instability of floor roadway under the influence of mining,the combination of site investigation,theoretical analysis,numerical calculation and field measurement methods are used.Firstly,the simplified calculation model of surrounding rock stress for floor roadway was established,and the calculation formula of that was theoretically derived.Secondly,the mining-induced responsive laws and deformation mechanism of surrounding rock stress for floor roadway were deeply analyzed.The results show that in the mining-induced neighborhood,the response of surrounding rock stress for floor roadway is extremely sensitive,and dynamic pressure coefficient of major principal stress is continuously increasing,which is the main stage for deformation occurred in surrounding rock.It is also found that mining response value of horizontal stress of floor roadway is much higher than that of vertical stress,which easily causes serious deformation in places where high deviatoric stress exists for two sides of roadway,as well as damage to bracing structure of roof load.Moreover,that can lead to instability of surrounding rock and collapse disaster of roof.Finally,engineeringpractice for roadway supporting shows that the compound control technology proposed(i.e.anchor with grouting-pressure relief cable-floor cable)is effective for stability controlling of rockmass around floor roadway.

关 键 词：底板巷道 采动响应 移动支承压力 采动邻域 围岩控制 

分 类 号：TD322[矿业工程—矿井建设]